Improvement in pressing and polishing metal vessels



UNrTED STATES PATENT OFFICE.

JOHN NEUMANN, OF NEW YORK, N. Y.

IMPROVEMENT IN PRESSING AND POLlSHlNG METAL VESSELS.

Specification forming part of Letters Patent No. 37,822, dated March 3, 1863.

To a/ZZ whom it may concern.-

Be it known that I, JOHN NEUMANN, of the city, county, and State of New York, have invented a new and useful Machine for Pressing and Folishing Cylindrical Metal Vessels; and I do hereby declare that the following` is a full, clear, and exact description of the same, reference being had to the accompanying drawings, making a part of this specification, in Which- Figure 1 is a back view of my invention in elevation. Fig. 2 is a transverse vertical section of the same, taken in the linem Fig. l. Fig. 3 is an end view of the same in elevation.

Similar letters of reference indicate corresponding parts in the several iigures.-

This invention is designed to supersede the ordinary hand process of beating or hammering cylindrical vessels constructed of copper and ductile metal compositions, which is done in order to compact and render the metal firm and stiff, and also to polish the same afterbeing annealed and soiled in the process of brazing. The hammering process, even when performed by a skillful workman, does not cause the work to have a smooth and even appearance. The marks of the hammer will be distinctly visible, and considerable labor is necessarily expended in the work.

The invention consists in placing the cylindrical vessel to be operated upon in a mandrel which is centered in a lathe, and using in connection therewith a steel roller attached to a lever, the latter being fitted on a slide-rest, and all arranged in such a manner that by rotating the mandrel and vessel in the lathe and operating the slide-rest the roller, by the application of power to its lever, will be made to press against the vessel, and compact the metal of the same, and also polish it, and at the same time befed along from one end of the vessel tothe other,sothat the whole of its surface will be duly acted upon by the roller.

To enable those skilled in the art to fully understand and construct my in vention,l will proceed to describe it.

A represents the bed of an ordinary turninglathe; B, the head of the same which contains thehrcvolving mandrel O, and D thehead which is provided with the movable center E. These parts being old and well known do not require a minute description.

F represents a mandrel, which is centered in the lathe. This mandrel may be constructed of cast-iron, of cylindrical form and hollow, with heads fitted in its ends. On this mandrel the vessel G to be operated upon isiitted, and consequently the mandrel should be of sucha diameter as to correspond with the internal diameter of the vessel. The vessel of course is not provided with its ends or heads. These are attached after the cylindrical portion on the mandrel is finished. The ends or heads, however, whether one or two are employed, are an unimportant feature in the vessel, being not much seen and generally of small area, and therefore may be acted upon in the usual or old manner.

H represents a case or oblong box, which is attached to two horizontal and parallel bars, a a., and these bars are secured by proper clamps l I to the bed A of the lathe. NVithin the ease H there is placed horizontally a screw, J, having on one end, at the outer side of the case H, a toothed wheel, K, into which apinion, L, gears, the latter being on a shaft, b, which is provided with a crank, M. On the screw J there is a nut, N, which extends upward in front of theupper edge of the caseH, and over the upper end of this nut the forked part of a lever, O, is fitted, said lever having a steel roller, F, in its forked end, and anotch or recess, c, made in its under side to fit over a bead, d, on the upper front end of the case H, as shown in Figs. 2 and 3. l

The operation is as follows: Thevessel G,after being constructed in the usual mannerthat is to say, of a piece of sheet metal bent in cylindrical form, and its ends or edges connected by brazing-is cleaned by washing .it with dilute sulphuric acid, (the usual means employed for that purpose.) The vessel is then placed on the mandrel F, and the lever O adj usted on the case H and over the nut N. By thus adjusting the lever O the steel roller P is brought in contact with the exterior of the vessel G at a point below the axis of the mandrel F. (See Figs. 2 and 3.) The outer end of the lever O is then pulled down by the operator; or a weight is hung upon it inorder that the roller P may be made to press orbear against the vessel G sufficiently hard to compact the metal and at the same time burnish or polish it. The screw J is rotated from the shaft Z through the medium of the gearing K L, said shaft b being rotated bylhand-power applied` to the crank M or driven from the mandrel C of the lathe. The screw J as it rotates moves, of Course, the nut N, and the latterfeeds or moves along the lever O and roller l?, the lever resting or bearing on the bead d as a fulcrum. The feed movement of the rollerV claim as new, and desire to secure by Letters Patent, is-

The employment 0r use, in combination With a lathe and mandrel, of a lever, O, provided with a steel or other hard metal roller, P, applied to a slide-rest orv other equivalent feed mechanism in such a manner that thelatter will properly feed the lever and roller along while the same is pressed against thekvessel G on the mandrel, and also serve as a bearing or i'ulcruni for the lever, substantially as and for the purpose herein set forth.

- JOHN NEUMANN.

Witnesses:

M. S. PARTRIDGE, GEO. W. REED. 

